32. A recent spate of launching and operating mishaps with television satellites led to a corresponding surge in claims against companies underwriting satellite insurance. As a result, insurance premiums shot up, making satellites more expensive to launch and operate. This, in turn, has added to the pressure to squeeze more performance out of currently operating satellites. Which of the following, if true, taken together with the information above, best supports the conclusion that the cost of television satellites will continue to increase? A. Since the risk to insurers of satellites is spread over relatively few units, insurance premiums are necessarily very high. B. When satellites reach orbit and then fail, the causes of failure are generally impossible to pinpoint with confidence. C. The greater the performance demands placed on satellites, the more frequently those satellites break down. D. Most satellites are produced in such small numbers that no economies of scale can be realized. E. Since many satellites are built by unwieldy international consortia, inefficiencies are inevitable.
48. A researcher discovered that people who have low levels of immune-system activity tend to score much lower on tests of mental health than do people with normal or high immune-system activity. The researcher concluded from this experiment that the immune system protects against mental illness as well as against physical disease. The researcher’s conclusion depends on which of the following assumptions? A. High immune-system activity protects against mental illness better than normal immune-system activity does. B. Mental illness is similar to physical disease in its effects on body systems. C. People with high immune-system activity cannot develop mental illness. D. Mental illness does not cause people’s immune-system activity to decrease. E. Psychological treatment of mental illness is not as effective as is medical treatment.
题目只说从低的免疫系统程度会有低的mantal healthy，得出免疫系统能免疫mantal illness，但为什么depand on D呢？？看了OG的解释依然不懂？？
32. 你没完全看懂题目吧。 文中. 说This, in turn, has added to the pressure to squeeze more performance out of currently operating satellites. 所以D就是对的。 就好像本来10个人干的活，现在叫5个人干，那5个人当然容易吃不消了。
48。 这是典型的 A causes B. assumption： 不是B causes A 的题型。做多了就明白了。
谢谢leeon, 我题干看差了, insurers underwrite launching and operating of satellites; 所以C项的satellites break down frequently (operating)直接就导致premium high, 不需要等到launching失败才导致premium high.
但: OG解释说B项支持费用不变: the impossibility of pinpointing the causes of failure, metioned in B, is consistent with the cost of satellites remaining stable. 我想问的是B项如何与费用稳定一致?
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发表于 2004-2-1 23:05:00
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，将就着看吧……希望对你有帮助哦！）
